Putön Rinch’en Drubpa (1290-1364) completed the major classification and translation of Indian texts. He founded the monastery of Shalu and authored a history of Buddhism. As abbot of Shalu, a major learning center, he sought to distribute the two Buddhist cannons, the Kangyur (contains the Sutras, Tantras, and the Vinaya) and the Tengyur (Indian commentarial works). These texts were used as scholarly resources, and Püton used them to reinforce the rationalized approach of Madhyamaka in opposition to the Jongangpa’s use of the Sutras to express shamanistic insight.